CVA, as you know I too have a S7, and have seen first hand his acting out, so I would say your S7, seems to be doing that as well. The only advice that I can give on the subject is keep telling him that you love him, and maybe see about some IC, for not just him, but for all your kids. They are really going to need it, now that the papers have been filed.
As I have said, kids are not fine with D, like the world would want us to believe, it takes it's toll, and why wouldn't it? their whole world is being turned upside down, and who the heck would be OK with that? When I hear that nonsense, it makes me so irate! Being a child of D, I know that is a big lie! Take care.